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<br />Figure 27 The splkedace.
<br />endemiC 10 the Gila River baSin of
<br />Arizona and Sonora. is listed as
<br />threatened The specimens
<br />Illustrated are ca 70 mm In total
<br />length, from the Verde River,
<br />Arizona. lemale above, male
<br />below
<br />
<br />,:.... -.----. .
<br />..- ~.~
<br />-:-".'21.
<br />......
<br />. :";"'\-:-Il~.~ ~-~~:~~~':"'--'".;...~
<br />~-... . .,,-..:.T...... .'; -~-........ -. ...,...~
<br />. ...._: ... ",' _~ . i" ..., '. .. -.... .... ~"ll:
<br />'" ',' l.c' . . .
<br />...,;"'....: ...'
<br />
<br />lower Color.nlo b;lsln supported Joout 1 S fish
<br />SPt"(Jc'>, SIX ot thc:st" wt"rt' ~m.dl. shorr-JJ\ed minnows.
<br />JnJ an equJI IlUmhC:T \H:H.' 1.1f~~'r. Inn,lo:c:r-li,'ed
<br />mllln\J\\'~ and ~u(ktr~ Four e\'en hU,Io:t.( .toJ more
<br />long-lived mlOno\\'~ ,!OJ suckers. mo~t lOffimon In
<br />"bi~'nn'r' habH.ITs, cntt'reJ small fln'r~ .\nJ our
<br />hJ.\"c spa.....nt"u rht.rt., ,I) IS dlscusseJ kiter L.l;,t, J
<br />puplish ;wJ wpmlnn\l\\ In tht" Gila b.lsll1 .l"~t'nd{"d
<br />TO sll,!o:hdy mort" th.ln I ~UO m dt"\-atlOn_ lkre. .wJ .It
<br />lower dc\".Hwns. rht:~, u((upleJ m;H~IH;"s and Strt"dm
<br />mar,!o:lns, a~ \)utbneJ bdll\\. .t1lIl1Jo: with uther IQ\\"
<br />J,'~crt ~pt.tl,-~
<br />TIll." RIO Y:tqUl suppOrt~ 20 sp,'un, only three ot
<br />\\'hl(h .Ire shatt"J with tht, C\llor:tdo. l'sln,c tht, S.lmt"
<br />Ll[e~()r1es .h Jh\we, c1t:ht wert. small :tnJ sh'ln-bn:d.
<br />123ft: IUJo:et .lnd lunJo:cr-Il\'ed. bur nont' Cpt'r!ups one
<br />lIt two. see [:tr,'t) ;Hl- dt'.Irly .'bl,g'r1\'l'f In nolu}.:y
<br />A purfish h\'Cs .It 11IJo:hn dt'\dlhlO. .mJ rupmlnnt"'t~
<br />:tn' rern'st"Olcd hy d number of sped,"S thaI IIh"
<br />from n"Lnin-ly hlt:h dt.\'.ltlOn to the r1h"r.s mourh
<br />Shorc-Jilt'J minllun, -Amun,.: rillS .I::rnup {II
<br />rnmnO\n, 'Plkn!:tet'. spmt',lJlt"s, 10.1\:11 mlnno\\.
<br />rn.n.,I/l1I ",r/"rIIJJ". and spt-lkk-d J,llt' .1ft" In th{"
<br />COlllt.ldo syst{"m All Me n'blt'J t\) orht,t spencs of
<br />western i',;{lrth Amt"C1l.l. and .III om tht, last .Itt:
<br />c:ndemu:. lommt'"nsurJtt. wlrh rht' It)n~ IS,)1.nlon uf
<br />tht: Color.iJ{) R"','r baSin, LllOt:t'in Jalt..I",.,J/ffJ .,lllJ
<br />Idr~o1. .InUther ~redn ul \\'e~tern rd.ltlllnshlps, 15
<br />dlJft:J by the (..)I,lr,lllll .Ind Y.lllul systems :\llnnow~
<br />With e.lSlt"rn rd,ltllln,hlr,,-hc:tUBt'U! shwer ,.Inll'lrl.,
<br />"';''''MoJ. :\texl(.l.n s[{)nt'tolll"t ,-"d"f't"lro1) '11<'.\H.OI" .In,l
<br />ucna.tt. mlnnl1w'/;ir.ij,ut.. ....'IJ!.I-.lf(. n'strllteJ to the
<br />RIO Y,14ul a.nJ .Issol:latl"d h:t~ln.. to rh~" ..ourh In
<br />,\texlca.
<br />The splh-da..:e lfl~ 2-) 1)<:CUrlt'~ ffiIJ".Ht'r
<br />hanlt:lts o{ runs. pllllb, and ~wlrlll1l' l'JdlC:~. whl:te It
<br />feed.. on dntrln~ a4uarlc .lnJ [('rresHldl In,ecb Th,'
<br />spec It";' IS m,mlcd J,'r,.dh-. "livery on th,' sldt.s. Jnd
<br />\1,:hirened r>t'ne,nh \l.l1t" 10 hret.Jmt:. ((lIldltlnn
<br />be(ume F{)tden ur orJ.~'Y lln rh"lr Jot,,1I Jnd I.lter,1I
<br />surta":t's ~rJwmn~ IS III srrm1o= .InJ 'ummel. with
<br />
<br />youn,lo:t'r females sp.lwmnt: once J.nd oldet I~m:tles
<br />rwu:e each ~'ear. I.lte expl.tt,lnty IS rwo or three
<br />years, ,lOd the fish r.l[d~. eXlt'(.ds -5 mm m roul
<br />lent:ch_
<br />SrmeJan's IFig. 21:0 occur m the Little Colorado
<br />.InJ Vlr...;1O tl\,'r\., .lnJ 11\ Isolatt'd sprmg\. of the
<br />
<br />,~~
<br />
<br />. .~
<br />........
<br />- .
<br />.. .
<br />
<br />Figure 28 Above, Lillie Colorado spmedace. 80 mm m total
<br />lenglh. Irom lhe Lltlle Colorado River. Anzona. Below: Virgm
<br />splnedace. ca 90 mm In tOlallength. Irom Beaver Dam Creel<..
<br />Arizona Both species are conSidered threatened by the
<br />Amencan Fisheries Society endangered speCies committee.
<br />
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<br />15
<br />
<br />01100
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